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空时编码能够为无线通信系统提供高数据速率及性能 .本文在相同频带利用率下将空时格码与空时发射分集的性能进行了比较 .同时 ,针对准静态瑞利衰落信道 ,提出了几种优化的低码率空时格码 .理论分析和仿真表明 ,在相同的频带利用率下 ,该低码率空时网格码可具有比空时发射分集更好的误码率性能 ,更适合于对频带利用率要求不高的功率受限无线通信系统
Space-time coding can provide high data rate and performance for wireless communication systems.This paper compares the performance of space-time trellis codes and space-time transmit diversity in the same frequency band utilization.At the same time, for the quasi-static Rayleigh-fading channels, Several kinds of optimized low bit rate space-time trellis codes.Theoretical analysis and simulation show that under the same frequency band utilization, the low bit rate space-time trellis codes can have better bit error rate performance than space-time transmit diversity, It is more suitable for power-limited wireless communication systems that require less bandwidth utilization